Multilayer insulating bodies, process for their preparation and application

Abstract

A multilayer insulating body (1) with two outer layers (2, 3) joined together over at least part of their surface, is described, the body being characterized in that between the two outer layers (2, 3) an intermediate layer (5) containing textile fibers (4) is arranged, that at least the two outer layers (2,3) are joined over at least part of their surface at joint locations (6), in particular by welding. Within the area of the joint locations (6) the entire insulating body (1) may comprise passages (7), in particular slits. An insulating body (1) is obtained in this manner, which is thermally insulating by means of its intermediate layer (5) containing the fibers (4), wherein the fibers (4) may be sealed of gas and vapor tight against the environment. On the other hand, the entire insulating body (1) may be made gas and vapor permeable in spite of the slits (7).

I claim: 
     
       1. A multilayer insulating body with two outer layers (2, 3) joined together at least over part of their surfaces, and with a fiber (4) containing intermediate layer (5) being arranged between the two outer layers, at least the two outer layers are joined together at joint locations (6) in the shape of strips over part of their surfaces and in the areas of the joint locations (6), passages (7) formed by slits penetrating through the entire insulating body (1) are provided, said slits being shorter than the length of the joint locations and being preferably centered on the longitudinal axis of the strip shaped joint locations. 
     
     
       2. Insulating body according to claim 1, characterized in that at least the two outer layers (2, 3) are welded together in the joint locations in the form of welds. 
     
     
       3. Insulating body according to claim 2, characterized in that the joint locations (6) are located in a distribution over the entire insulating body (1). 
     
     
       4. Insulating body according to claim 3, characterized in that the insulating body is web shaped and that the strip shaped joint locations (6) are aligned parallel to the longitudinal edges of the web. 
     
     
       5. Insulating body according to claim 4, characterized in that the joint locations (6) are extending continuously over the entire length of the web. 
     
     
       6. Insulating body according to claim 4, characterized in that the joint locations (6) are laid out in rows parallel to the edges of the web. 
     
     
       7. Insulating body according to claim 6, characterized in that the joint locations (6) of adjacent rows are offset relative to each other and preferably are overlapping. 
     
     
       8. Insulating body according to claim 1, characterized in that the strip shaped joint locations (6) are aligned over the surface of the insulating body (1) so as to form a pattern. 
     
     
       9. Insulating body according to claim 8, characterized in that at least one of the two and preferably both, outer layers (2, 3) consists or consist of a sheet. 
     
     
       10. Insulating body according to claim 9, characterized in that the passages (7) are slits passing through the entire thickness of the insulating body (1) and that said slits are shorter than the length of the joint locations (6) and are preferably centered on the longitudinal axis of the strip shaped joint locations (6). 
     
     
       11. Insulating body according to claim 10, characterized in that in the case of strip shaped joint locations (6) arranged in parallel rows, the slits (7) of adjacent rows are offset relative to each other and preferably are overlapping. 
     
     
       12. Insulating body according to claim 11, characterized in that at least one of the two outer layers (2, 3), in particular the outer layer consisting of the gas and vapor tight material, comprises passages, preferably slits, outside the joint locations (6). 
     
     
       13. Insulating body according to claim 12, characterized in that the web shaped insulating body (1) comprises weights, preferably one or several weighting elements, at its longitudinal edges, said weighting elements being arranged preferably between the two outer layers (2, 3). 
     
     
       14. Insulating body according to claim 13, characterized in that the fibers (4) are synthetic fibers and that preferably the intermediate layer (5) containing the fibers (4) consists of a fiber fleece. 
     
     
       15. Insulating body according to claim 14, characterized in that the fibers (4) are present in the intermediate layer (5) with a weight per unit area of 10 to 200 g/cm 2 , preferably 15 to 50 g/m 2 .